The revolution won’t happen because the revolutionary leader does not appreciate being tricked into becoming a revolutionary leader. So, once he has the choice between taking control of the system (the engine), rather than reorganize the whole social structure (the train) in a more fair manner, or blowing up the whole train, kill a big chunk of humanity’s last survivors, and maybe doom the rest to freeze to death, he picks the latter, of course.
The premise of the movies is not all that different from other dystopian, post-apocalyptic films: ecological disaster (here, global warming and a cure for it that turns out to be just as bad as it), mass death humanity. The few survivors live on a train whose engine technology allows it to run forever on a worldwide track (one circuit = one year). The train is highly stratified and functional: each car corresponds to one layer of stratification or one specific function, with the tail being the “urban”, overcrowded ghetto and the front of the train the luxury areas, with the engine at the very head.
The social structure very much resembles the setting of In Time or Panem, with the more peripheral areas being the poorest of having the least prestigious functions (making the protein blocks that feel the tail cars — if you thought Soylent Green was bad… — where cannibalism was practiced before), prison, military (with enforcement of the segregation system). The semi-peripheral areas are higher in prestige and living conditions (hydroponics, schools, meat lockers, aquarium), inhabited by what looks like the middle class. And the core area get the luxury accommodations where the wealthiest denizens live in leisure and indolence, and depravity.
The engine is populated by one person, Wilford, the corporate leader who built the train and its track system, who lives alone and whose job it is to keep the entire system working in a sustainable fashion, which includes manufacturing rebellions from the tail that will allow for some culling of the population, and keep the tail in line with the right balance of fear. It’s like the old AGIL system in action.
This is also an totalitarian system marked by repression and deprivation (even though it’s not clear what the tail people contribute to the entire system, except for children, which they have in large numbers). The inequalities are extreme and the tension is always high in the tail.
The premise and the context are actually interesting (if not entirely original) but the main characters are so completely absurd that they ruined the movie, in my not-so-humble opinion, especially Curtis Everett, the rebellion leader played by Chris Evans. As I noted above, what drives his ultimate decision is not the improvement of the well-being of the tail people or more drastic changes in the system, but rather his ego. He is ticked off at the realization that he was manipulated from the get-go into getting the latest rebellion started. Moreover, Curtis is supposed to be a reluctant leader, rejecting the label over and over, even though he gives the orders and decides on everything the rebels do.
So, when offered the opportunity to control the engine, he prefers to blow up the entire train, based on the shaky view of an imprisoned security specialist who thinks the temperatures are rising (even though a punishment for the criminal elements in the tail cars is to have a limb exposed to the cold for a few minutes, and then amputate the frozen limb). Even if that were true, a warming would probably take decade, most of the earth’s population is dead, no infrastructure works anymore, and no one has grown food is 18 years, so the whole “let’s leave the train and go live outside” makes no sense whatsoever.
So, again, I liked the premise, but the plot, oy.